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lapo4ka [179]
3 years ago
8

I need the answers Pls

Biology
1 answer:
skelet666 [1.2K]3 years ago
8 0

Answer:

1a

2d

3a

Explanation:

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Differences in traits such as hair texture are determined by differences in ? A) The location of sugar groups in DNA B)the seque
netineya [11]

Answer:

A

Explanation:

This is called the locus and is determined in Meiosis by gametes from parent cells. During meiosis there is this thing called 'crossing over' where the gametes (sperm and egg cells) homologous genes (genes of similar size and shape, such as X and Y chromosomes or X and X) exchange genes on the same locus to provide slightly different characteristics.

Please check this with your teacher but i believe that this is right. Hope this helps. ;)

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Why can't the circulatory system miss any cells?
algol [13]
The missed cells would die
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Aerobic respiration happens in what cellular organelle?
kolbaska11 [484]
Aerobic respiration happens in the mitochondrion of eukaryotic cells.

Anaerobic respiration does not use oxygen gas and happens in one process after glycolysis called Fermentation.

The process used to make beer would be a kind of fermentation, Alcohol fermentation, I believe.
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During which part of the cell cycle do gene mutations occur?
Svetlanka [38]
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Cholesterol's main role in the membrane seems to be:
olga nikolaevna [1]

Answer:

E) Improve membrane fluidity

Explanation:

Cholesterol constitutes the basic structural element of the skeleton of cell membranes. Without their reinforcement, the membranes would become extremely fluid and lose their consistency. Cholesterol is found in the esterified membranes in its hydroxyl group (OH): with fatty acids, mainly oleic and linoleic, or as cholesterol sulfate. The cholesterol-sulfate polar group is disposed on one of the faces of the membrane that interacts with other polar groups in that area, while its bulky hydrophobic portion is embedded between the apolar parts of the lipids that form the membrane skeleton and They fulfill many other functions, among which the reduction in the permeability of protons and sodium ions, and their participation in signal transmission. Cholesterol is also essential in phagocytosis processes carried out by cells to capture many nutrients and, in general, for the function of cleaning up organic waste produced by macrophages.

The membranes must have a fluid structure so that the integrated proteins can move "horizontally" to interact with their ligands and with other proteins. The fluidity is given by unsaturated fat. With the excess of saturated fat, the membranes become rigid, but only with the necessary unsaturated fat the membranes are extremely fluid and very sensitive to temperature changes. Cholesterol stabilizes the structure of the membranes; In order for them to have the correct structure, they must have the correct proportions of saturated, unsaturated fats and cholesterol. The membranes produced in the laboratory without cholesterol are unstable to temperature changes, drastically modifying their fluidity against the small temperature changes that occur in the physiological range.

In addition to its functions in cell membranes, cholesterol is an important product that metabolism uses as a raw material to make other compounds:

*Bile salts

*Sex hormones

*Hormones of the adrenal cortex (corticosteroids)

*Vitamin D (Calciferol)

3 0
3 years ago
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